Grand piano



FIG. 1 is a perspective view of a grand piano showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines within the Figures are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a grand piano, as shown and described. 